Transmission Friction Element Apply Time Out of Range
Code P273B indicates that the transmission control module (TCM) has detected that a specific friction element (clutch or band) is taking too long or too little time to apply during a shift. This can be caused by low transmission fluid, a clogged filter, worn friction plates, or a faulty solenoid. The TCM monitors the apply time and compares it to expected values; if the time is outside the acceptable range, this code is set.
1. Most Common Causes
- Low or contaminated transmission fluid
- Clogged transmission filter
- Worn or burnt friction plates
- Faulty shift solenoid or valve body issue
2. Symptoms You Will Notice
- Harsh or delayed shifts
- Slipping transmission
- Check Engine Light illuminated
- Reduced fuel economy
3. Step-by-Step Diagnosis
Step 1: Check transmission fluid level and condition; top off or replace if necessary.
Step 2: Scan for additional codes and perform a transmission adaptive reset using a professional scan tool.
Step 3: Inspect wiring and connectors to the transmission solenoids for damage or corrosion.
Step 4: Perform a pressure test and solenoid resistance test to identify faulty components.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause further damage to the transmission. Limited driving to a repair shop is acceptable.
How much does it cost to fix?▼
Diagnosis typically costs $50-$150. Repairs can range from a simple fluid change ($100-$200) to solenoid replacement ($200-$500) or transmission rebuild ($1500-$4000).
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.